Tire-vulcanizing device



F. B. PFEIFFEH.

TIRE VULCANIZING DEVICE.

APvLncArloN mw um s. ma.

Patented Jam. 13, 1920.

UMTED STATES FRED BROWN PFEIFFER, 0F AKRON, OHIO.

TIRE- VULCANIZIN G DEVICE.

To all whom it may concern.'

Be it known that I, Flinn-BI.,PFE111'ER, a citizen of the UnitedStatesresidin 'at Akron, in the county of Summit and trite of Ohio, haveinvented a new and useful 'l`ire-Vulcanizilig Device, of which theffo1-lowing is a specification.

The device -forming the subjecbmatter of this application is adapted tdbe einployed for curi-ng the casings of -automobile tires,l and theinvention aims torprovide novel means whereby the curin of the casing'may be pinching or buckling the casing, the necessary heat und pressurebeing afforded in a single operation.

It is within the province of the disclosure to improve generally and' toenhance the utility of devices of that type to which the presentinvention appel-tems.

"ith the above and other objects in view, which will appeal' as ceeds,the invention resides in the combination and arrangement details ofconstruction hereinafter described :mdclaimed. Changes in the preciseernbodiment of the invention shown can be made without the invention.

In the accompanying drawin Figure 1 shows in side elevation, a deviceconstructed in accordance with the invention, parts being broken away;

Fig. 2 is a cross section taken on the line 2'-2 of Fig. 1; Fig. 3 is afragmental section of the casin member illustrating details which, for t1e sake of clearne have been omitted in 2; Fig. 4 is a agremdepartinglfrom vthe spirit of matic elevation showing one form of means forsupplying heat and pressure. g1

In carrying` out the present invention 'there is provided an annularmold 1 comprismg coperating parts 2 rovided at one end with lugs 3 umtedby a inge 4 so that the parts 2 of the mold may be opened and closed.The opposite ends of part 2 of the mold are sup lied with lu 5. A latch6 of any desire construction 1s pivoted to one of the lugs 5, the otherlug 5 having a notch 7 wherein the latch 6 ma be received, to

hold the parts 2 of the mo dtogether. v The interior with a mold 1 isprovided in its and the mold,

circuxnscribmg groove 8, therefore, may be described shaped incrossseetion.

Specification of Letters Patent.

Application tiled lay 9, 191B. Serial nu ar casing 10 which `broughtVabout wit out' the description proof parts and in the Patented J'an.13, 1920. no. assess..

mold are provided with openings 9, which may be oppositely disposed.

Located Within the groove 8 of the mold 1 and conforming closely theretois an an is trough-shaped in cross section, the casing embodying innerand' outer walls. The inner wall of the caslng 1'0 may be supplied, inits tread portion. with pro]ections 11. The inner wall of the casi-nglogis provided, adjacent its edges, with 'inwardly projecting ribs 12.The cas mg 10 carries oppositely dis iosed nipplesl 11 adapted to bereceived in the openings 9 of ,the parts 2 of the mold l. One of Ythenipples 11 may be connected with a conduit 15, in which is interposed aheater 16, a pressure tank 17, a pump 18, and a valve 21, the valve 21bein located between thc heater 16 and the tan 17.

'ilhe casing 10 may be made of an sii d material or of any desired cominatici?) of materials, but it is desirable that thd casin shall beflexible, and, at the same time, sha l be so constructed that it willcondu. t heat. It maybe desirable to fashion th casing 10 out of layersof woven wire fa ric 19 and alternating layers 20 of rubberized fabric,the const1tuent layers of the casing being vulcanized to form a unitaryStructure. r

In practical operation, the tire 22 which is'to 4be cured is placedwithin the casing 10, and the casing 10 is placed in the groove 8 of themold 1, the nipples 14 passing through the openings 9 in the mold, andthe parts 2 of the mold being held closed by means of the latch 6 or itsequi ident. A Huid, which may be either a liqui 'or a gas, is deliveredby the and is let into the-heater 16 by opening the valve 21 to andesired degree. Erom the heater 16, the flilid flows byM fof the conduit15 into the interior of, under pressure, and heated to the desiredextent, the casing thus being expanded and being rced to grip thetire'22 closely; The projections 11 on the casi-ng 10 forni antiskiddingpro'ections 23 on the tire 22, and the ribs 12 orm the clencher thetire. It will be obvious, however, tht't pump 18 to thfe'ltank'llthemcasing 10,

beads 24 of the inner surface of the casing 10 willie e tank 17, the

,of the drawingsA as regards pump 18, and

the valve 21 is largely diugrnnimatie and may be departed from withouty"opurdizing the utility of the invention `it being necessary, merelythat sonne suitable means be provided for under pressure into the enslng10.

When the hented uid is supplied under pressure through one of thenipples 14. the fluid muy he permitted to pues out of the other nipple14. thun seein-ing :l eircnlation, the pressure hein maintained` und theconstruction being;r miei that :i le1-ies of devices, constructed innceordnm'e with the invention muy he eonnected together. The heatedHuid. delivered within the easing 1l) causes the, casing to expand undto grip the tire 2:2 Closely. outward expansion of the easing beinlnnited by the inold 1. the tire being Sustained internally hy n forni50. The device is s0 constructed that it affords the neeessnry heut undany desired presure.y it being possible to eure n tire casing, withndinitiing-zl hented Huid' n device of the sort llereinhefore Het'forth, without pinching or buckling the raising, n uniform pressure onthe ensing-l'ming secured throughout the euring operntion.

Having timel described. they invention, wlnit is claimed is- In :idevice of theelnss described. un nnnnlnr mold; u flexible hollow annularensing` disposed within the mold. the ensing being trough-shaped in eroysection to receive n tire, and beingr nnule partly of metal to conductheut: ineens for supplying n fiuid under pressnreto the interior of theensing, und nie-.ins for heating the flnid prior to its intrmlnetioninto the .eminem ln testimony thnt lhiini the foregoing :is my own. Ihave hereto :illixed lmy `ngnntule in the presence of two witnesses.

FREI) BR( )WN lFlill l1` l" ER. W i tnesees t M. J. KUGLER. S. W.BANil-umr

